Function DrawOverlappedWindowForAll

src/window.cpp:947–962

* From a rectangle that needs redrawing, find the windows that intersect with the rectangle. * These windows should be re-painted. * @param left Left edge of the rectangle that should be repainted * @param top Top edge of the rectangle that should be repainted * @param right Right edge of the rectangle that should be repainted * @param bottom Bottom edge of the rectangle that should be repain

 * @param bottom Bottom edge of the rectangle that should be repainted
 */
void DrawOverlappedWindowForAll(int left, int top, int right, int bottom)
{
	DrawPixelInfo bk;
	AutoRestoreBackup dpi_backup(_cur_dpi, &bk);

	for (Window *w : Window::IterateFromBack()) {
		if (MayBeShown(w) &&
				right > w->left &&
				bottom > w->top &&
				left < w->left + w->width &&
				top < w->top + w->height) {
			/* Window w intersects with the rectangle => needs repaint */
			DrawOverlappedWindow(w, std::max(left, w->left), std::max(top, w->top), std::min(right, w->left + w->width), std::min(bottom, w->top + w->height));
		}
	}
}

/**
 * Mark entire window as dirty (in need of re-paint)